package com.rich.web.filter;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.rich.domain.User;

/**
 * Servlet Filter implementation class PrivilegeFilter
 */
@WebFilter(filterName="/privilege",urlPatterns= {"/jsp/cart.jsp","/jsp/order_info.jsp","/jsp/order_list.jsp"})
public class PrivilegeFilter implements Filter {


	public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws IOException, ServletException {
		//强转
		HttpServletRequest request = (HttpServletRequest) req;
		HttpServletResponse response = (HttpServletResponse) resp;
		
		//逻辑
		User user = (User) request.getSession().getAttribute("user");
		if(user == null) {
			request.setAttribute("msg", "请先登陆！");
			request.getRequestDispatcher("/jsp/msg.jsp").forward(request, response);
			return;
		}
		
		//通过
		chain.doFilter(request, response);
	}

	@Override
	public void destroy() {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void init(FilterConfig arg0) throws ServletException {
		// TODO Auto-generated method stub
		
	}


}
